Ulsan National Institute of Science and Technology

Polar-Twisted Electron-Transport Layer Simultaneously Breaks Efficiency-Flexibility-Cost Limits in Organic Solar Cells

Abstract Perylene diimide (PDI)-based electron-transport layers (ETLs) are fundamental in governing charge extraction, interfacial recombination, and the operational longevity of organic solar cells (OSCs), yet their molecular design still lacks transferable principles. Here we p...

Optoelectronic Resistive Switching Memory Enabled by a Zero‐dimensional Manganese(II) Hybrid Complex

ABSTRACT Lead‐free organic–inorganic hybrid metal halide compounds are emerging as promising alternatives to conventional lead‐based materials for optoelectronic applications. However, their implementation in non‐volatile memory devices remains largely unexplored. Herein, we repo...

Data-driven personalization of just-in-time adaptive mental health intervention via two-stage reinforcement learning approach

Most digital mental health interventions still deliver uniform content, without accounting for how a user’s fluctuating psychological state interacts with their stable individual characteristics. We propose a two-stage offline reinforcement learning (RL) framework, trained on dat...

Iron Oxide Photoanode for Glycerol-Assisted Hydrogen Production at 8.87 mA cm–2

Iron oxide (α-Fe2O3) is an attractive photoanode for photoelectrochemical water splitting because of its abundance, suitable band gap, and stability in water, yet its practical use remains limited by poor charge transport and sluggish water oxidation. Here we show that these limi...

Hierarchical DefectEngineering for Spectral PhononControl in Monolayer MoS2

Abstract Two-dimensional (2D) transition-metal dichalcogenides are attractive for nanoelectronics and energy harvesting, where thermal transport critically impacts device reliability, performance, and energy efficiency. Here, we establish hierarchical defect engineering in monola...

Mitigating Concentration Polarization in Dry‐Processed Ultra‐Thick Cathodes Using a Low‐Viscosity Electrolyte With Soft Li + Solvation

ABSTRACT Dry‐processed high‐loading cathodes are essential for realizing high‐energy‐density lithium‐metal batteries because they increase areal capacity while minimizing inactive components. However, the dense and tortuous structure of dry‐processed ultra‐thick cathodes severely...